Materials Literature
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The effects of alkyl side chain and spacer lengths and the type of terminal group on the morphology and crystallization of a homologous series of biscarbamates (model compounds for polyurethanes) were investigated. Biscarbamates were synthesized with alkyl side chains of various lengths ranging from C4 to C18 and an a…
The properties of the interface in a phase-separated solution of polymers with different degrees of polymerization and Kuhn segment lengths are calculated. The starting point is the planar interface, the profile of which is calculated in the so-called “blob model”, which incorporates the solvent in an implicit way. Th…
We report on a low-damage method for direct and rapid fabrication of arrays of epitaxial BiFeO3 (BFO) nanoislands. An array of aluminium dots is evaporated through a stencil mask on top of an epitaxial BiFeO3 thin film. Low energy focused ion beam milling of an area several microns wide containing the array-covered fi…
Although bone is a nanocomposite of mineral and collagen, mineral has been the more elusive component of study. A standard for bone mineral is clearly needed. We hypothesized that the most natural, least-processed bone mineral could be retrieved from the most highly mineralized bone. We therefore studied the rostrum o…
Structural and static magnetic properties of a series of ferrites nanoparticles (the size ranges from 7.6 to 13.5 nm) having nominal chemical composition DyxMn0.5Zn0.5Fe2−xO4 (x = 0, 0.02, 0.04, 0.06) have been investigated. The x-ray diffraction analysis clarifies that the samples crystallize in typical cubic spinel…
This article reports on two polylactide composites obtained by melt compounding containing two silver-based biocide montmorillonites. The active clays are differentiated by the biocide agent oxidation state, i.e. in one sample silver is in ionic form and in the other as native nanoparticles. In both cases, composites…
In addition to the primary α-process, some neat glass formers show a well resolved secondary β-process (type-B) or solely an excess wing (type-A). We investigate two binary glass forming systems composed of a type-A and a type-B component. (2)H nuclear magnetic resonance (NMR) spectroscopy is selectively applied to th…
(1)H NMR measurements are reported for D2O solutions of paramagnetic complex [Er(H2O)(EDTA(4-))](-) (I) for temperature interval 273-319 K. Diamagnetic complex [Lu(H2O)(EDTA(4-))](-) (II) was used as an NMR reference compound. The spectra obtained have been analyzed using a band-shape analysis technique in the framewo…
This paper presents a designing a battery-less piezoelectric based energy harvesting interface circuits with 300mV step-up voltage. A technique (i.e., DC-DC Step-Up converter) has chosen for designing the startup voltage with low voltage energy (i.e., 300mV). The proposed method consumes very little power, and is espe…
Ba 2 CoNbO 6 ceramic samples were synthesized by solid‐state reaction technique. X‐ray photoemission spectroscopy reveals the coexistence of mixed‐valent structure of Co 2+ / Co 3+ in the sample. Dielectric measurements reveal that the sample shows colossal dielectric behavior. This behavior is contributed by two ther…
Low molecular weight amphiphilic derivatives of chitosan were synthesized, characterized and their antifungal activities against Aspergillus flavus and Aspergillus parasiticus were tested. The derivatives were synthesized using as starting material a deacetylated chitosan sample in a two step process: the reaction wit…
This paper deals with the modelling of the combined hydrogen embrittlement phenomena: hydrogen-enhanced local plasticity (HELP) and hydrogen-induced decohesion (HID) in dissimilar welds through a cohesive zone modelling approach (CZM). Fractured samples of dissimilar weld interfaces in AISI8630/IN625 show that cracks…
Abstract Lead styphnate (LS) and lead azide (LA) must be considered vulnerable to accumulation and discharge of static charge under all conditions. To reduce the risk aroused by static initination hazard in the processing and handling of LS and LA, antistatic modifations of LS and LA are necessary. In this paper, four…
A small amphiphile that contains a coumarin unit and alkynyl groups, as a two-photon-cleavable segment and polymerizable groups, respectively, was designed and synthesized. The amphiphile showed a critical aggregation concentration of about 4.6×10(-5) M and formed a vesicle-type assembly. The formed vesicles were stab…
Pr-doped BiFeO3 ceramics with x ≤ 0.20 were synthesized by a solid-state reaction method. X-ray diffraction patterns of these samples have shown single-phase rhombohedral structure with R3c space group symmetry. Remanent magnetization has been found to increase with Pr concentration. Magnetization versus temperature p…
N2 shuffle: One-electron reduction of the ansa-zirconocene complex with a side-on dinitrogen ligand furnished the corresponding anion in which the hapticity of the N2 ligand changed to end-on. Oxidation of the anion regenerates the neutral complex with concomitant change in N2 hapticity. The zirconocene complexes with…
In this work, we report the effect of a capping agent on the structural and optical properties of nanocrystalline ZnS particles, which have been synthesized by co-precipitation method. The structural properties of ZnS nanoparticles have been characterized by X-ray diffraction (XRD) analysis. The XRD patterns show a he…
In this study, fabrics with different plain, tuck and float stitch combinations in three different tightness levels as tight, medium and loose are produced from combed ring spun cotton yarn. It is aimed at determining the effect of fabric structure on liquid absorption, transport and permeability properties, which are…
Locally defined nanomembrane structures can be produced in graphene films on a SiC substrate with atomic steps. The contact conductance between graphene and a metal-coated nanoprobe in scanning probe microscopy can be drastically reduced by inducing local buckling of the membranes. Repeatable current switching with hi…
Widespread application of biodegradable polyesters is restrained by inferior mechanical properties, higher cost, and lack of reactive functional sites for further modification. A new class of multiblock copolymers bearing reactive sites on the main chains, composed of poly(butylene fumarate) (PBF) and poly(butylene su…